Package org.apache.hadoop.hive.ql.plan

Examples of org.apache.hadoop.hive.ql.plan.FetchWork

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      if (resultTab == null) {
        String resFileFormat = HiveConf.getVar(conf, HiveConf.ConfVars.HIVEQUERYRESULTFILEFORMAT);
        resultTab = PlanUtils.getDefaultQueryOutputTableDesc(cols, colTypes, resFileFormat);
      }

      FetchWork fetch = new FetchWork(loadFileDesc.getSourcePath(),
                                      resultTab, qb.getParseInfo().getOuterQueryLimit());
      fetch.setSource(pCtx.getFetchSource());
      fetch.setSink(pCtx.getFetchSink());

      pCtx.setFetchTask((FetchTask) TaskFactory.get(fetch, conf));

      // For the FetchTask, the limit optimization requires we fetch all the rows
      // in memory and count how many rows we get. It's not practical if the
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  protected void genColumnStatsTask(QB qb, List<LoadTableDesc> loadTableWork,
      List<LoadFileDesc> loadFileWork, List<Task<? extends Serializable>> rootTasks) {
    QBParseInfo qbParseInfo = qb.getParseInfo();
    ColumnStatsTask cStatsTask = null;
    ColumnStatsWork cStatsWork = null;
    FetchWork fetch = null;
    String tableName = qbParseInfo.getTableName();
    String partName = qbParseInfo.getPartName();
    List<String> colName = qbParseInfo.getColName();
    List<String> colType = qbParseInfo.getColType();
    boolean isTblLevel = qbParseInfo.isTblLvl();

    String cols = loadFileWork.get(0).getColumns();
    String colTypes = loadFileWork.get(0).getColumnTypes();

    String resFileFormat = HiveConf.getVar(conf, HiveConf.ConfVars.HIVEQUERYRESULTFILEFORMAT);
    TableDesc resultTab = PlanUtils.getDefaultQueryOutputTableDesc(cols, colTypes, resFileFormat);

    fetch = new FetchWork(loadFileWork.get(0).getSourcePath(),
        resultTab, qb.getParseInfo().getOuterQueryLimit());

    ColumnStatsDesc cStatsDesc = new ColumnStatsDesc(tableName, partName,
        colName, colType, isTblLevel);
    cStatsWork = new ColumnStatsWork(fetch, cStatsDesc);
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    boolean aggressive = "more".equals(mode);
    FetchData fetch = checkTree(aggressive, pctx, alias, source);
    if (fetch != null && checkThreshold(fetch, pctx)) {
      int limit = pctx.getQB().getParseInfo().getOuterQueryLimit();
      FetchWork fetchWork = fetch.convertToWork();
      FetchTask fetchTask = (FetchTask) TaskFactory.get(fetchWork, pctx.getConf());
      fetchWork.setSink(fetch.completed(pctx, fetchWork));
      fetchWork.setSource(source);
      fetchWork.setLimit(limit);
      return fetchTask;
    }
    return null;
  }
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      for (String path : emptyPath) {
        pathToAliases.remove(path);
      }

      // create fetch work
      FetchWork fetchWork = null;
      List<Path> partDir = new ArrayList<Path>();
      List<PartitionDesc> partDesc = new ArrayList<PartitionDesc>();

      for (String tablePath : pathSet) {
        PartitionDesc partitionDesc = newWork.getMapWork().getPathToPartitionInfo().get(tablePath);
        // create fetchwork for non partitioned table
        if (partitionDesc.getPartSpec() == null || partitionDesc.getPartSpec().size() == 0) {
          fetchWork = new FetchWork(new Path(tablePath), partitionDesc.getTableDesc());
          break;
        }
        // if table is partitioned,add partDir and partitionDesc
        partDir.add(new Path(tablePath));
        partDesc.add(partitionDesc);
      }
      // create fetchwork for partitioned table
      if (fetchWork == null) {
        TableDesc table = newWork.getMapWork().getAliasToPartnInfo().get(alias).getTableDesc();
        fetchWork = new FetchWork(partDir, partDesc, table);
      }
      // set alias to fetch work
      newLocalWork.getAliasToFetchWork().put(alias, fetchWork);
    }
    // remove small table ailias from aliasToWork;Avoid concurrent modification
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    private FetchWork convertToWork() throws HiveException {
      inputs.clear();
      if (!table.isPartitioned()) {
        inputs.add(new ReadEntity(table, parent));
        FetchWork work = new FetchWork(table.getPath(), Utilities.getTableDesc(table));
        PlanUtils.configureInputJobPropertiesForStorageHandler(work.getTblDesc());
        work.setSplitSample(splitSample);
        return work;
      }
      List<Path> listP = new ArrayList<Path>();
      List<PartitionDesc> partP = new ArrayList<PartitionDesc>();

      for (Partition partition : partsList.getNotDeniedPartns()) {
        inputs.add(new ReadEntity(partition, parent));
        listP.add(partition.getDataLocation());
        partP.add(Utilities.getPartitionDesc(partition));
      }
      Table sourceTable = partsList.getSourceTable();
      inputs.add(new ReadEntity(sourceTable, parent));
      TableDesc table = Utilities.getTableDesc(sourceTable);
      FetchWork work = new FetchWork(listP, partP, table);
      if (!work.getPartDesc().isEmpty()) {
        PartitionDesc part0 = work.getPartDesc().get(0);
        PlanUtils.configureInputJobPropertiesForStorageHandler(part0.getTableDesc());
        work.setSplitSample(splitSample);
      }
      return work;
    }
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        for (ColumnInfo colInfo: gbyOp.getSchema().getSignature()) {
          colNames.add(colInfo.getInternalName());
        }
        StandardStructObjectInspector sOI = ObjectInspectorFactory.
            getStandardStructObjectInspector(colNames, ois);
        FetchWork fWork = new FetchWork(allRows, sOI);
        FetchTask fTask = (FetchTask)TaskFactory.get(fWork, pctx.getConf());
        fWork.setLimit(allRows.size());
        pctx.setFetchTask(fTask);

        return null;
      } catch (Exception e) {
        // this is best effort optimization, bail out in error conditions and
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    prop.setProperty(serdeConstants.SERIALIZATION_NULL_FORMAT, " ");
    String[] colTypes = schema.split("#");
    prop.setProperty("columns", colTypes[0]);
    prop.setProperty("columns.types", colTypes[1]);
    prop.setProperty(serdeConstants.SERIALIZATION_LIB, LazySimpleSerDe.class.getName());
    FetchWork fetch = new FetchWork(ctx.getResFile(), new TableDesc(
        TextInputFormat.class,IgnoreKeyTextOutputFormat.class, prop), -1);
    fetch.setSerializationNullFormat(" ");
    return (FetchTask) TaskFactory.get(fetch, conf);
  }
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        Byte small_alias = tags[j];
        Operator<? extends OperatorDesc> tblScan_op2 = parentOps[j];
        localPlan.getAliasToWork().put(small_alias.toString(), tblScan_op2);
        Path tblDir = smallTblDirs.get(small_alias);
        localPlan.getAliasToFetchWork().put(small_alias.toString(),
            new FetchWork(tblDir, tableDescList.get(small_alias)));
      }

      newPlan.setMapLocalWork(localPlan);

      // construct a map join and set it as the child operator of tblScan_op
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      localPlan.getAliasToWork().put(alias_id, topOp);
      if (tblDir == null) {
        tblDesc = Utilities.getTableDesc(partsList.getSourceTable());
        localPlan.getAliasToFetchWork().put(
            alias_id,
            new FetchWork(partDir, partDesc, tblDesc));
      } else {
        localPlan.getAliasToFetchWork().put(alias_id,
            new FetchWork(tblDir, tblDesc));
      }
      plan.setMapLocalWork(localPlan);
    }
  }
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      }

      assert localPlan.getAliasToWork().get(alias) == null;
      assert localPlan.getAliasToFetchWork().get(alias) == null;
      localPlan.getAliasToWork().put(alias, topOp);
      localPlan.getAliasToFetchWork().put(alias, new FetchWork(new Path(alias), tt_desc));
      plan.setMapLocalWork(localPlan);
    }
  }
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